Means and method for forming artificial-rock scenery



L. D. JENSEN Sept. 30, 1930.

MEANS AND IBTHOD FOR FORMING ARTIFICIAL ROCK SCENERY Filed May 1, 1928 1IN V EN TOR. 11.44952? W Em. Z

Patented Sept. 30,1930

ENT' OFFICE LABS D. JENSEN, OF IDIEG-O, G QLIFORNIA MEANS AND METHOD sonFORMING AnrI'F I oIAn-nooK scEnERY Application filed May 1, 1928;;Serial 1193274 337 I My invention relates to means and method forforming artificial rock scenery, and the objects of my invention are;first, to provide a process for forming artificial rock structure 5 fromplastic material; second, to provide a simple and economical means andmethod for forming the outer surface of rock structure composed ofplastic material; third, to provide a means and method of this class inwhich an infinite variety of shapes and forms are produced; fourth, toprovide a process for forming artificial rock structure in which paperis used as the'surface forming medium; fifth, to providea novel meansand method for forming extremely irregular exterior surfaces for plasticwalls from which the forms may be easily removed ;'and, sixth, toprovide a process of this class which is extremely economical and whichwill provide a weather-resisting and Water tight homogeneous structure.

With these and other objects in. view, as

will appear hereinafter, my invention consists of a certain novel formand process. for forming artlficlal rockscenery structure, as w1ll beherelnafter described in detail and particularly set forth in theappended claims,-.

sectional view thereof taken along the line 2-2 of Fig. 1; Fig. 3 is aperspective View of a crinkled sheet forming a curved mold showingmethod of propping, and Fig. 4 isa plan view thereof.

Similar characters of reference refer to similar parts and portionsthroughout the several views of the drawings. 1

The crinkled paper 1, frames 2 and 3, props 5 and 6, form the principalparts of the mold employed in my novel artificial rock scenery. Thecrinkled paper 1 is preferably supported on a frame 2 comprising uprightmembers E2, and horizontal members 2", the paper being tacked orotherwise secured to the frame Where necessary to hold it in anysuitable position. It will be understood that the same may be held atvarious angles and may assume curved shape, if desired; The rear portion3 of the. mold may ,be made of board supported I on uprights 3 or anyother means of supporting the compound wherenot normally visible may beemployed. The compound l is poured into the mold care being. taken toprevent rupture of the crinkled paper indoing so, and after the compoundhas set the mold is removed leaving the irregular rock likesurfaceitisdesired toobtain. In some cases it is quite practical tosupport thecrinkled paper by means of props 5 and pegsfd, as illustratedin Figs; 3 and 4:, which show a perspectiveand planview of my novel moldas applied in the formation of a curved portion of a wall or cliff. "Theprops 5 are of suitable length and may be' embedded at their lower endin the adjacent soil while the pegs may be driven in at suitable pointsto preventthe lower edges of the paper from shifting ,as the compoundlispoured against the paper. 'I-find that itis possible to use ordinarynewspaper sheets for this purpose; however.- it'is frequently moredesirable to uses. stifferfpaper and it is also advantageous toimpregnate the paper with a moisture proof material,such asparaffin-wax, kero- "sene, tar, orv the like, before'or. after it has"been crinkled. This both increases its rigidity and prevents-it fromrupturing due to the water or excessive pressure of the mass of plasticcompound used. Owing to the'peculiar shapes of the paper mold'whencrinkled, it is possible to obtain a surface which closely simulatesthat of natural rock and this process thereby produces a very pleasingand realwalls, and the like. It is, of course, obvious that only thatportion of the mold forming the surface which is subjected to view anddesired to be formed with agged and uneven surfaces need be made of thecrinkled paper, or similarmaterial, while the other surfaces may beformed in any suitable manner such as by means of wood, wire-netting, orthe like.

Though I have described a particular means and method for formingartificial rock scenery, I do not wish to be limited to this isticeffect when used for constructing in situ artific al cliffs, caves,garden scenery, ponds,

particular means or method, but desire to include in the scope of myinvention the means or method substantially as set forth in the appendedclaims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

1. In a mold for forming artificial rock scenery from a plasticcompound, a forming surface made of crinkled paper providing anirregular, agged surface and braces for supporting said forming surfacein posi tion.

2. In a mold for forming artificial rock scenery, a forming surface madeof crinkled paper, said paper providing an irregular, jagged surfacebeing impregnated With a Water proofing substance, and braces forsupporting said forming surface in position.

3. In a mold for forming artificial rock scenery from a plasticcompound, a forming surface made of crinkled, semi-flexible, semi-rigidmaterial with a Water proofing substance forming an irregular, jaggedsur face and braces for supporting said forming surface in position.

4. In a mold for forming artificial rock scenery in situ from plasticcompound, a forming surface made of crinkled sheets forming anirregular, jagged surface, adapted to retain substantially its formWhile said plastic compound sets, and an exteriorly positioned frame forsupporting said sheets in position, said frame bearing against saidsheet in relatively Widely spaced points only.

In testimony whereof, I have hereunto set my hand at San Diego,California this 26th day of October 1927.

LARS D. JENSEN.

